Thanks for your help Arjan, the 0/0 finally worked :) I was testing the connection 
from one of the other servers in the buildings, 
and the server had a real IP address not 172.27.40.0/23 still like, so ipnat was 
NATing for it too. But after I added "map xl0 from 
172.27.0.0/23 to y.y.y.y/32 -> 0/0", it worked.

All the best,
veedee.

On Tue, 4 Dec 2001 21:18:08 +0100, Arjan de Vet wrote:
>In article <[EMAIL PROTECTED]> you write:
>># allow everything to the another building
>>add allow ip from any to 172.27.40.0/23
>>add divert natd ip from any to any via xl0
>>add allow ip from any to any
>I'm not familiar with natd but I guess this means that traffic towards
>172.27.40.0/23 should not be NATted but the rest should.
>>my internal network is 172.27.0.0/23 and the network in the other building is
>>172.27.40.0/23. Their configuration is correct as they are able to
>>masquerade with another building succesfully. Now, what we were doing is
>>allow our workstations to use their services one with another. So a station
>>from the other building (let's say 172.27.40.133) was able to ftp, telnet,
>>ssh to a station in my building (for instance 172.27.1.5). So what was sent
>>to the other building was sent "un-masqueraded" (the divert rule came after allow). 
>Also
>>we had to add a route like:
>>"route add -net 172.27.40.0 otherbuilding 255.255.254.0".
>>-- ipnat.rules --
>>map xl0 172.27.0.0/23 -> x.x.x.x/32 proxy port ftp ftp/tcp
>>map xl0 from 172.27.0.0/23 to any -> x.x.x.x/32
>Try something like this:
>map xl0 from 172.27.0.0/23 to 172.27.40.0/23 -> 0/0 proxy port ftp ftp/tcp
>map xl0 from 172.27.0.0/23 to 172.27.40.0/23 -> 0/0
>map xl0 from 172.27.0.0/23 to any -> x.x.x.x/32 proxy port ftp ftp/tcp
>map xl0 from 172.27.0.0/23 to any -> x.x.x.x/32
>0/0 is a special directive to indicate that no NAT-ing should take place
>(0/32 is shorthand for the current IP address of the xl0 interface,
>useful if that address is obtained via DHCP).
>The first two rules say that traffic from 172.27.0.0/23 towards
>172.27.40.0/23 should not be natted (but the kernel ftp proxy is still
>used in this case). The rest will be NAT-ed to x.x.x.x.
>
>.....
>
>Arjan
>
>-- 
>Arjan de Vet, Eindhoven, The Netherlands               <[EMAIL PROTECTED]>
>URL : http://www.iae.nl/users/devet/            <[EMAIL PROTECTED]>
>Work: http://www.madison-gurkha.com/  (Security, Open Source, Education)




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